Changed my plugs last week. Many thanks to TxStig for his coil puller. Took about 1.5 hours (without beer breaks). My car had 40k when I bought it two years ago, and has 61k now. I don't remember if the dealer said the plugs had been changed when I was in for the 50k service, so I'll have to follow up on that.

Per comments elsewhere, the car was very "happy" to have new plugs. :-)

There was some variation in plug deterioration, the rearmost pair looking pretty bagged. My suspicion is that those two, at least, were original.

That does look pretty worn. Do you have pics of some of the other plugs. Those rears are a B()** to get out and then get the coils back on. I wouldn't be surprised if a lazy tech didn't replace the rears.